Paper Title :Grain Refinement of Cast Al-Si-Mg Alloys using Electromagnetic Stirring
Author :A. K. Rajak, B. B. Kumar, C. K. Meena, D. K. Dwivedi
Article Citation :A. K. Rajak ,B. B. Kumar ,C. K. Meena ,D. K. Dwivedi ,
(2018 ) " Grain Refinement of Cast Al-Si-Mg Alloys using Electromagnetic Stirring " ,
International Journal of Mechanical and Production Engineering (IJMPE) ,
pp. 19-23,
Volume-6,Issue-3
Abstract : This paper describes the effect of electromagnetic stirring current (11-15A) on the microstructure of Al-7%Si-
0.5%Mg and Al-17%Si-0.5%Mg alloys. Electromagnetic stirring (EMS) of semi-solid aluminium alloys was carried out
under continuous cooling conditions. To investigate the effectiveness of the EMS systems, castings processed by EMS using
different current values and mechanical stirring were prepared using graphite mould (to ensure slow cooling rate). It was
found that EMS can be effectively used with hypoeutectic and hypoeutectic Al-Si alloys to get modified eutectic even
without any modifier. EMS was found to be more effective than mechanical stirring in controlling the microstructure of as
cast samples. The optimum current for EMS to achieve the better control over the structure varies with silicon content in the
alloy. Optimum current was found to increase with increase in Si content in aluminium alloy. At very low currents the
Electromagnetic stirring gave better results as compared to that at high current and mechanical stirring. Results were
substantiated by scanning electron microscopy.
Keywords - Cast Al-Si-Mg alloy, electromagnetic stirring, mechanical stirring, current, eutectic modifications and grain
refinement
Type : Research paper
Published : Volume-6,Issue-3
DOIONLINE NO - IJMPE-IRAJ-DOIONLINE-11448
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Copyright: © Institute of Research and Journals
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Published on 2018-05-01 |
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